Question

我有一个包含2个UIPickerviews的现有Viewcontroller。现在我想用另一个变量添加另一个UIPickerview。怎么做？

class ViewController: UIViewController,UIPickerViewDelegate {

@IBOutlet weak var pickerview1: UIPickerView!
@IBOutlet weak var pickerview2: UIPickerView!
@IBOutlet weak var pickerview3: UIPickerView!

var reps = ["1 x","2 x","3 x","4 x","5 x","6 x","7 x","8 x","9 x","10 x","11 x","12 x","13 x","14 x","15 x","16 x","17 x","18 x","19 x","20 x","21 x","22 x","23 x","24 x","25 x"]

var weight = [["0","1","2","3","4","5"],
            ["0","1","2","3","4","5","6","7","8","9"],
            ["0","1","2","3","4","5","6","7","8","9"],[","],
            ["0","25","5","75"],["kg","lbs"]]

var exercises = [["A","B","C"],["X","Y","Z"]]


func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {

    return ((pickerView == pickerview2) ? reps.count : weight.count)

}

func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {

    return ((pickerView == pickerview2) ? 1 : weight[component].count)

}

func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String! {

    return ((pickerView == pickerview2) ? reps[component] : weight[component][row])

}

第三个UIPickerview应该在Viewcontroller中显示变量练习。

Answer 1

您可以使用switch语句

例如：

func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
    switch pickerView {
    case pickerview1:
        return reps.count
    case pickerview2:
        return weights.count
    case pickerview3:
        return exercises.count
    default:
        assertionFailure("Unknown pickerView")
    }
}

旁注：我已经匹配了你的变量名，但我认为你应该让你的pickerView变量名为camelCase，即pickerView1而不是pickerview1。

将另一个UIPickerView添加到UIViewController

1 个答案: